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Muscular System
how muscles contract,what makes them contract
16 cards·by arevajav
Epimysium
surrounds skeletal muscle and all fascicles in a muscle.
Perimysium
surrounds individual fascicles and seperates muscle into small compartments.
Endomysium
surrounds individual muscle fibers.
sacrolemma
cell mambrane of a muscle fiber (cell)
Sacroplasm
cytoplasm of a muscle fiber (cell)
Myofibril
threads of protein inside sacroplasm
myosin
thick protein filament inside a myofibril
actin
thin protein filament inside myofibril
I-band
actin filaments attached to Z-Lines
Z-Line
protein to which actin binds
A-Band
region where myosin overlaps actin (vise versa)
Sacromere
unit of muscle from Z-line to Z-line
Motor Neuron
nerve cell that connects to muscle fiber
Neuromuscular Junction
connection between motor neuron and muscle fiber
Neurotransmitter
chemicals that go from neuron to muscle fibers
Motor Unit
consists of motor neuron and a muscle fiber